Cylinder-wrench.



No. 644,676. Patented Mar. 6, |900. H. LUND.

CYLINDER WRENCH.

(Application filed Apr. 6, 1899;]

(No Model.)

'NTTED STATES PATENT Fries.

HENRY LUND, OF GRAFTON, NORTH DAKOTA.

CYLINDER-WRENCH.

SPECIFICATION forming part of Letters Patent No. 644,676, dated March 6, 1900.

Application filed April 6, 1899. Serial No. 711,908. (No model.)

To all whom it' may concern:

Be it known that I, HENRY LU ND, a citizen of the United States, residing at Grafton, in the county of Walsh and State of North Dakota, have invented certain new and useful Improvements in Cylinder-Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to wrenches,and has for its especial object to provide a simple and efflcient wrench adapted for convenient use in connection with t hreshing-cylinders to tighten and loosen the nuts which secure the cylinder-teeth in position. The wrench is, however, adapted for many other uses and is particularly serviceable for many classes of work where ordinary wrenches cannot be used.

To the ends above indicated my invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

My improved wrench in its preferred form is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a plan view of the said wrench, one position of the wrench-head being shown by fulllines and another by dotted lines. Fig. 2 is a transverse section taken through a portion of the wrench, approximately on the line x25c2 of Fig. 3, some parts being broken away. Fig. 3 is a view looking at the end of the wrench, some parts being broken away and others bein g sectioned. Fig. 4 is a view looking at the recessed end of the nut-socket; and Fig. 5 is a detail in edge elevation, showing the sliding and reversing pawl.

The numeral 1 indicates a strong bar or rod which is provided at one end with a transversely-extended handle or handpiece 2 and at its other end or head 3 is provided with a perforation through which the stem or trunnion of the wrench-head is passed. This wrench-head 4 is provided at one end with a stein or trunnion 5, by means of which it is pivotally mounted in the perforated end or head 3 of the bar or rod 1, the sam e, as shown, being secured against endwise displacement by a pin 6, between which and the head 3 a washer 7 is shown as placed. The'wrenchhead 4 projects at approximately a right an gie to the bar or rod 1, and at its outer end it is bifurcated or formed with laterally-spaced ears S.

The trunnion or shaft portion 9 of a wrenchsocket 10 is passed through and mounted to rotate in the ears 8 of the wrench-head 4, and rigidly secured on the shaft or trunnion 9, as shown, by means of a pin 11 and working between the ears 8 is a ratchet-wheel 12, the teeth of which are adapted to work in both directions. Mounted to slide in a suitable seat 13 in the wrench-head 4 for cooperation with the teeth of the ratchet 12 is a sliding pawl 14. This pawl 14 is provided on one edge, but at different sections, with the re= versely-inclined cam-surfaces 15 and 16, that engage with the teeth of the said ratchet-wheel. At its rear edge the said pawl 14 is provided with three depressions 17. A spring-pressed detent 1S, which is mounted in a suitable seat 19, formed in the wrench-head 4, cooperates with the recesses 17 to hold the pawl14 in any one of three positions, to be hereinafter noted. The detent 18 is subject to the action of a light coiled spring 20, and, as shown,` it is provided with a conical head 21, the point of which engages with the said recesses 17 in the pawl 14. The pawl 14 is further preferably provided with lugs or stops 22 at its ends, which engage with a projected portion 23 of the wrench-head 4 and prevent the said pawl from being thrown out of an operative position.

The operation of the device above described will be substantially as follows: For action on the nuts of a threshing-cylinder the wrenchhead and nut-socket will usually be set asindicated by full lines in Fig. 1, in which position the said head and socket may be inserted between the bars of the cylinder and the nutsocket may be drawn into engagementwith the selected nut on the adjacent bar. If a nut with right-hand threads is then to be loosened, the pawl14 is slid into the position indicated by full lines in Figs. 1 and 2. Then by oscillatin g the stern 1, handle 2,and wrench; head v4 the nut may be unscrewed by a ratchet action. As is obvious by inspection of Fig.

2, the pawl 14 is spring-held for cooperation with the ratchet 12 and will be cammed backward by the ratchet-teeth engaging with the beveled surface 15 thereof under reverse or return movements of the wrench-head and parts moving the same. It is also evident that the engagement of the conical or pointed head 21 of the detent 18 holds the pawl14 against accidental end wise movements. If a nut is to be tightened, the required reverse ratchet action will be given when the pawl 14 is moved downward to its extreme position, in which position the point of the said detent engages the upper' recess 17 of the said pawl. Then it is desired to lock the nutsocket 10 to the wrench-head 4, the pawl 14 is moved into an intermediate position, so that portions of each of the reversely-heveled surfaces 15 and 1G engage the teeth of the ratchet, and thus hold the said ratchet so that it cannot turn in either direction. In this intermediate position of the pawl 14 the point of the detent 18 engages the intermediate recess 17 of the said pawl.

For some work it will be desirable and often necessary to turn the wrench-head 4 so as to throw the nut-socket projected, as shown by dotted lines in Fig. 1, or, in otherwords, to'

reverse the direction of projection of the nutsocket. For still other Work it will be found desirable to turn the nut-socket and Wrenchhead at a right angle to the position illustrated in Fig. 2. These possible adjustments of the wrench-head adapt the wrench for a great variety of work, which in many instances could not be performed at all hy wrenches of ordinary form and in other instances whch could be performed with ordinary wrenches only by a very considerable inconvenience.

It will of course be' understood that the socalled wrench-socket may be made to suit the size and shape of various nuts to be operated upon. Furthermore, this so-called nutsocket, instead of being recessed to receive the nut, might for certain classes of Work be provided with an angular projection made to fit within a corresponding recess of a nut or otherpart to be operated upon. It will also be understood that my invention above specifically described is capable of man v other modiiications in its details of construction Within the scope of my invention.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a wrench, the combination with a rod or bar, of a wrench-head pivoted thereto and projected laterally therefrom, and a nutsocket carried by said wrench-head and projected in a plane parallel to said rod or bar, substantially as described.

2. In a wrench, the combination with a Wrench-head, of a nut-socket or nut-engaging portion rotatively mounted in said wrenchhead, and provided with a ratchet, and an endwise-sliding pawl having reversely-inclined ratchet-engaging sections, substantially as and for the purposes set forth.

3. In a Wrench, the combination with the wrench-head and its operating bar or rod, of the nut-socket rotatively mounted in said head and provided with the ratchet 12, a sliding pawl 14 having the reversely-beveled ratchet-engaging sections 15 and 16, and the spring plunger or part mounted in said head and yieldingly pressing said pawl to its work, substantially as described.

4. In a wrench, the combination with the bar or rod 1 and handpiece 2, of the Wrenchhead 4 formed with the ears S, the nut-socket 10, the stem 9 of which is rotatively mounted in said ears 8, the ratchet 12, secured to said stem 9, the sliding pawl 14 mounted in said head 4 and provided with the reversely-heveled surfaces 15 and 1G and recesses 17, and the spring-pressed detent 18, the point 20 of which engages said recesses 17, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY LUND.

Witnesses:

JOSEPH DESCHENER, D. NAILLANCOURT. 

